Police are searching for a group of people who attacked and robbed a delivery worker in Flatbush Tuesday night. The NYPD says it happened around 8:40 p.m. along E. 22nd St., near Ditmas and Flatbush avenues. Investigators say a 30-year-old man was making a delivery when several people dressed in black clothing and ski masks jumped him. According to police, the group punched and kicked the victim before taking about $500 in cash, his iPhone, a 2-liter soda and a box of Parmesan bites. The delivery worker was taken to the hospital and is listed in stable condition. No arrests have been made, and detectives from the 70th Precinct are still trying to figure out how many people were involved. Anyone with information is asked to call the NYPD’s Crime Stoppers Hotline at 1-800-577-TIPS.